Assessment guidelines state that students must produce a 4500-word report (+/- 10%) excluding the list of references. This requirement allows students to demonstrate their developing knowledge and application of the teaching.

Which of the following is a correct interpretation of the word count requirement?
a) The report must be exactly 4500 words.
b) The report can be between 4050 and 4950 words.
c) The report must be at least 4500 words.
d) The report must be less than 4500 words.